====跟单（跟单请说明id/contact/item/qty/link/price）id
contact
item
qty (实际要的数量） 比如qty: 2 (buy one get 1 free)
link
price
跟单
id: 轻舞水云间
contact: 8200 零五八九
item1 : GNC Chromium Picolinate 200
qty : 2
link: http://www.gnc.com/product/index.jsp?productId=2718638
price: $9.99
item 2 : GNC Women's Evening Primrose Oil 1300
qty : 4
link: http://www.gnc.com/product/index.jsp?productId=4271922
price: $27.99
item 3 : GNC Women's Ultra Mega
qty : 2
link : http://www.gnc.com/product/index.jsp?productId=4033449
price : $32.99
contact: 8200 零五八九
item1 : GNC Chromium Picolinate 200
qty : 2
link: http://www.gnc.com/product/index.jsp?productId=2718638
price: $9.99
item 2 : GNC Women's Evening Primrose Oil 1300
qty : 4
link: http://www.gnc.com/product/index.jsp?productId=4271922
price: $27.99
item 3 : GNC Women's Ultra Mega
qty : 2
link : http://www.gnc.com/product/index.jsp?productId=4033449
price : $32.99
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